In order to stop the depreciation of the yen, the government and the Bank of Japan intervened on March 22 by buying yen and selling dollars. Will this “trump card”, which has not been pulled out in 24 years, be able to stop the yen from weakening?



Meaning: An important sword that has been handed down in a family from generation to generation. In other words, it is used only when the time comes. A trump card. To pull out a sword.

Other example

When you are in a bind as to what to make for dinner, how about trying the “trump card” curry with all the leftovers in the fridge?